hi ,
As per my knowledge if the cookie is disabled then u need to use urlredirect so that every time ur session id will get concated with ur url & if the cookie is enabled no need of doing this.
i hope this will help u.
bye
-kiran

http is a stateless protocol that means as soon u send a request to the browser it responds to the request that's all and does not remember anything.
for example if u r doing online shopping u will buy a item in one page and go the second page,when u go the second page u will not be able to see what u have purchased in the previous page since http is a stateless protocol.
so if u want to see what u have purchased in the first page when u go to the second we use session tracking.
so session tracking can be done in various like cookies,url rewriting,hidden form fields etc.

so basically session tracking is to remember the information what u have done earlier.
if u have any doubts mail me at lal_kiran at yahoo dot com

TechTarget provides technology professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective purchase decisions and managing their organizations technology projects - with its network of technology-specific websites, events and online magazines.